Abstract: A method for the nitro-carburization of a deep-drawn article or a stamped-bent article made of austenitic rustproof stainless steel includes inserting the article into an oven in a first process step and heating the article to a first temperature, wherein an oxygen containing standard atmosphere that is present in the oven is replaced by a first gas mixture, and in which the article is heated up to a second temperature in a second process step, wherein the first gas mixture is replaced by a second gas mixture, and in which the article is maintained on the second temperature in a third process step, wherein the article is treated with the second gas mixture, and in which the article is cooled down to a third temperature in a fourth process step, wherein the second gas mixture is replaced by a third gas mixture.

Abstract: A method for the carburization of a deep-drawn article or a stamped-bent article made of austenitic rustproof stainless steel includes inserting the article into an oven in a first process step and heating the article to a first temperature, wherein an oxygen containing standard atmosphere that is present in the oven is replaced by a first gas mixture, and in which the article is heated up to a second temperature in a second process step, wherein the first gas mixture is replaced by a second gas mixture, and in which the article is maintained on the second temperature in a third process step, wherein the second gas mixture is replaced by a third gas mixture, and in which the article is cooled down to a third temperature in a fourth process step, wherein the third gas mixture is replaced by a fourth gas mixture.

Abstract: In a method for the production of a heat exchanger, a turbulator insert is placed into a heat exchanging tube, with the turbulator insert having a solder applied thereon in at least one region. Weld spots using resistance welding are formed on an inner surface of the heat exchanging tube with the turbulator insert, and the inner surface of the heat exchanging tube is interlinked with the turbulator insert through brazing.

Abstract: A method for the carburization of a deep-drawn article or a stamped-bent article made of austenitic rustproof stainless steel includes inserting the article into an oven in a first process step and heating the article to a first temperature, wherein an oxygen containing standard atmosphere that is present in the oven is replaced by a first gas mixture, and in which the article is heated up to a second temperature in a second process step, wherein the first gas mixture is replaced by a second gas mixture, and in which the article is maintained on the second temperature in a third process step, wherein the second gas mixture is replaced by a third gas mixture, and in which the article is cooled down to a third temperature in a fourth process step, wherein the third gas mixture is replaced by a fourth gas mixture.

Abstract: A method for the nitro-carburization of a deep-drawn article or a stamped-bent article made of austenitic rustproof stainless steel includes inserting the article into an oven in a first process step and heating the article to a first temperature, wherein an oxygen containing standard atmosphere that is present in the oven is replaced by a first gas mixture, and in which the article is heated up to a second temperature in a second process step, wherein the first gas mixture is replaced by a second gas mixture, and in which the article is maintained on the second temperature in a third process step, wherein the article is treated with the second gas mixture, and in which the article is cooled down to a third temperature in a fourth process step, wherein the second gas mixture is replaced by a third gas mixture.

Abstract: In a method for the production of a heat exchanger, a turbulator insert is placed into a heat exchanging tube, with the turbulator insert having a solder applied thereon in at least one region. Weld spots using resistance welding are formed on an inner surface of the heat exchanging tube with the turbulator insert, and the inner surface of the heat exchanging tube is interlinked with the turbulator insert through brazing.

Abstract: The invention relates to a delivery device for a sheet-processing machine. The object of the invention is providing a delivery device on a sheet-fed rotary printing machine, that can be universally used and permits quality control of the printed and/or laminated sheets. to this end the delivery device includes rotating sheet feeding system 5 supplying the printed sheets to a first delivery stack 9 and with a drum 7 acting as a turnout point in front of this delivery stack 9 in the transport direction 2 for selective sheet removal. The drum 7 is allocated to the sheet feeding system 5. A vacuum table 14 coupled with a pneumatic system and with at least one rotating suction belt for suctioning, transporting, and positioning a sheet is arranged downstream from the drum in its rotational direction. At least one quality control device 12 for inspecting the sheet is arranged at a distance to the vacuum table 14, with the second delivery system 8 being arranged downstream from the vacuum table 14.

Abstract: The invention pertains to a delivery unit on a sheet-fed processing machine, preferably a sheet-fed printing or sheet-fed varnishing machine. The aim of the invention is to provide a delivery unit of this type such that permits in-line transport of printed and/or varnished sheets to at least one additional production line. To this end, the delivery unit 1 includes an endless revolving sheet conveyor system 5 that conveys the sheets to a first delivery stack 9 and a sheet withdrawal drum 7 that functions as a diverter for transferring sheets to a second stacking system. The sheet withdrawal drum is arranged upstream of this delivery stack relative to the conveying direction. A sheet transport system 20 is arranged downstream of the drum 7 and a folding module 12 is arranged downstream of the sheet transport system in the rotational direction 10 of the drum.